American Academy of Professional Coders (AAPC) Practice Exam

Which of the following structures does the dermis contain to nourish and innervate the skin?

1. Only blood vessels

2. Nerve endings and hair follicles

3. Vessels carrying blood and lymph, nerves, glands, and hair follicles

4. Only glands and follicles

The correct answer is: Vessels carrying blood and lymph, nerves, glands, and hair follicles

The dermis is a critical layer of the skin that serves several important functions, including nourishment and innervation. The correct choice identifies the comprehensive structures found within the dermis that contribute to these vital roles. The dermis contains a network of blood vessels that supply essential nutrients and oxygen to the skin while also aiding in temperature regulation. Additionally, lymphatic vessels within the dermis help to drain excess fluid and waste products, contributing to overall skin health. Moreover, the dermis houses nerve endings that provide sensory feedback, allowing the skin to respond to stimuli such as touch, temperature, and pain. This is crucial for the skin's protective functions. Glands, such as sweat and sebaceous glands, are also present in the dermis. These glands play important roles in regulating body temperature and maintaining skin hydration. Lastly, hair follicles, which originate in the dermis, also contribute to the skin’s overall functioning, providing insulation and protection. This combination of blood and lymph vessels, nerves, glands, and hair follicles illustrates the dermis’s comprehensive responsibility for nourishing and innervating the skin, making it essential for maintaining healthy skin and its functions.